Made of high durometer Hyper-Flex performance polyurethane. These End Link Grommets are economical, increase efficiency, and are easy to install. Use Energy Suspension sway bar end links with sway bar bushings to get the maximum performance benefit. Combine both for the same effect as buying a larger sway bar. Together they offer a dramatic improvement in performance and handling. For all vehicles: cars, trucks, and sport utility vehicles. They also last much longer than OEM rubber end links, not crushing out of shape after just a short time. Superior performance and greater longevity.